编辑代码

#include <stdio.h>
int main () {
    int a,b,c;
    char fu ;
    scanf ("%d %c %d" , &a , &fu , &b);

    switch(fu){
        case '+':
        c = a + b;
        break;
        case '-':
        c = a - b;
        break;
        case '*':
        c = a * b;
        break;
        case '/':
        c = a / b;
        break;
    }
    printf("%d\n" , c);
    return 0;
}